Phonograph



0m. 9, i923. 1,470,303 G. c. TROTTER PHONOGRAPH Filed Nov. 27. 1922 f llt GEORGE C. TRTTER, GE' ELKE-IAE@ LiKE., LISCONSL iQtSSIGNOR TO LAKE LABOBA TORES COMPANY, Ol ELKHAET LAKE, l/VESCONSIN, A COtZFORATION OF VlSf CONSN.

PHNOGRAPH.

Application filed November 27, 1922.

/'o 0,77 whom ai! mno/ conce/Mt.

Be it lrnown that i. (nonon C. l`no'r1nn, a citizen otl the United States, residingy Elkhart liale. in tho county o't iflhel'ioygafi and titate oit 1'."iliemnsin. have invented certain new and ueelful improvements in lhonog-graphe'7 oi" which. the following ie a Specilcation.

ll`his invention relates to a phonograph oli the type which enuiloys a turn tal/lc on which is mounted the usual 1qrooved record and more particularly it hanA to do with Such a phonograph which is electrically operated, and with a novel Switch hy which its opera tion is controlli-5d, it being an important oh ject oi' iny invention to devise t'or this purpose a Switch oli Special ci'infstruction.

ln the accompanying drawing is Shown an exeinplilication ol? this invention in the nianncr following:

Figure 1 is a liaginentary plan view of a conventional phonograph cquil'iped with the present switch;

Fig. 2 is; a side elevation o'lf the operating' parts oi the phonograph7 a portion otf the inotor hoard and turntable being; exhibited .in section in the plane ot line Q-Q ot Fig. l:

Fig. is, a detail in longitudinal section o'l'i the turntable Spindle per Se;

Fig. l is a view in plan oft' thc Spindle cap which Serves as a Switch; and

Fig, o ,ie a vertical Section therethrougli.

The parte` olt thc talkiirgmachine which are illustrate/il in the drawing, and which may follow ugual constructions, includeI an electric inotor A which is cin-rind upon .i hase li that is Secured to the under veide ot the inotor board C; suitable drivingY connerlioue: extend troni the niotor to a Spcrially constructed spindle l) which is liournaled in the base, the Spindle heine' projectthe base, the spindle `heinel projected therethrough and tl'irough the inol'or hoard to provide on its upper end a mountinn' :for the turntable lil on which ie rested a disc record 1"; and coiuierted with a suitahlc Hound chainher (notshowii) the usual tone arm (i, equipped with a reprmlucer ll and adapted to swing inwardly across the` record as its needle is tracked inthe grooves thereof. lt is with a phonograph answering` to this general description that the improvements forming; inv. invention are ee- ]'iecially adapted tOruSe. p i Referring now to Fig. in particular, t

Serial No. 603,407.

have Shown a Spindle provided with a central aperture in the form of a bore 1() extending downwardly from its top through a Substantial portion ot its length, the bore at its lower end communicating with a lateral here 11 which opens upon one side ot the Spindle. id'iove this lateral bore is an insulatiinr collar 12 adaptcdto tit rotatably 'within an opening 13 which entendel through the niotor hase; and ,extending from the lower spindle end is a trunnion or pin 1l which in journaled in' a hearing 15 that de pende ilfroin the inotor hase, the Spindle l eingthus Supported and e'teadied at these two points to eneure its rotation about a fixed vertical axis.

it conductor sleeve or hand 16 surrounds the collar 12 in its lower region, and in spaced relation to lthe n'lotor base, and tastened thereto is one end of a Suitahlyiinsulated conductor 17 in the torni of a Wirc which entende through the two bores 11 and l() to connect at 'its ropposite end with a Stud or pin 18 having a head 19, all as shown clearly in Fig. ln the upper end olI the Spindle here which is slightly enlarged secured an insulating bushing 20 iorzned with a seat to receive the Stud head, the bushingl thus providing a mounting in `which the Stud is fixedly held in insulated relation to the Surrounding` parte. By this construction also, the stud head presents ite upper `tace substantially flush with ythe proximate end of the Spindle whe-reen are Yliorined` certain external threads 21 which proceed downwardly lroin an annular Shoulder just helow the Spindle end.

te shownn the turntable E .isftorlned for n'iounting on 'the spindle s0 as to rotate therewitln the spindle projecting` thcretln'ough and throiurh thc record l? in the usual inanncr. rranpjed to co-operate with thc epindie is; a cap l formed with a loody 23 from which depend `circular walls Q4; and extending;- laterally Afrom the ,cap base are a pair `ot arinfa 25 and Qd diverging approximately at au angle olf about y90".' The 'former ot these arme, which ie short, has fi-pointed eX- treinity 27, while the other arm 2G is extcneihle 'with the aid of Va slide niece Q8 the ed 29 vv'heiieotI are bent toqoverlie the anni 2o tor lrictional connection therewith. Frein this arm is extended upwardly a tongue 30 adapted to engage the overlying edges 29 wheny the slide piece .is extended f` this aperture outwardly'to a desired distance. The outer end lof .the slideV piece terminates in 4thev form of an eye 31 of substantially the same internal diameter as the internal diameter ofthe walls 24, the purpose being to adapt the'eye also for fitting over the spindle end, when occasion requires. Extending laterally from the side oi' the eye which is remote from the cap is an abrupt shoulder the purpose of which will shortly appear.

'The exterior of the cap may be of any suitable configuration, but preferably is milled or serrated as at 33 to facilitate handling.` In its circular walls I have provided ablongitudinal slot 34 in which is received a springk 3,5, 'preferably of wire, having its upper end 36 secured to the cap in any"ap proved manner. At its lower end the'spring is inwardly crimped to provide a rounded head. 37 which norn'ially projects into the chamber within the lower cap end. Vith vsuch a construction the spring yieldingly :opposes a placing ot th-e cap over the spindle' end, the lspring head being forced back in the shoulder 22 betere it may reach alower position where it may engage with the spindle threads 21..y Then so positioned, however, the spring head may either ride insuchthreads, it a relative rotation ensues, orislide crosswise of them, provided that a-suiiicient vertical lforce be applied.

` In the cap body is a central aperture which extends through from its top to the chamber Lat the lower end. As shown, is of smallest diameter at the bottom, where `it accommodates af pin -38 having a head 89 adapted lto rest upon the seat formed by an abrupt increase in ythe diameter of the aperture; and 'bearing down upon the pin head is a compression spring 40 which is confined in place as by means ot' a screw 41 that is threaded 4into the aperture Atrom the top of therap. By some such means as this` I prov'vide 'in the cap chamber a pin which is adapted to engage yieldingly the head ot the s tud 18 when the cap is pushed down sufficiently over the spindle end; the pin head, however, limits the outward movement ot this part so as to avoid contact with the stud-except when the'cap is pressed down overy the spindle la sucient distance for this purpose'.

lThe electrical'circuit connections'used with the present construction may be very simple; As a suggestive layout, I have shown one leadX ruiming to an insulation block 42 which is mounted on the motor base, this lead connecting with a suitable brush J-B'wh-ich bears' constantly against the circular yband lor sleeve 16. The circuitis then taken through thewire 17 to the stud 18, and "through the cap, when this part is fitted down "in place, tothe spindle which is grounded; a grounded connection in the wire Y also extends from one pole of the motor, as shown. The other lead Z is connected with the opposite pole ot the motor in the usual manner.

In the use ot a phonograph `which einbodies the features ot my invention, the operations are about as follows: record disk is arranged upon the turntable, tollowing which the extensible. arm of the cap is properly adjusted. It is contemplated that this should be set to stop the motor when the record ceases to play. Accordingly it `will be found convenient to tit the eye ot the extension arm over the spindle end and then adjust the arm with the pointer 2T lying about even with the innermost playing groove ot the record. Having set the parts accordingly, the reproducer is placed in the proper position tor playing, and the cap itted over the spindle end. To start the motor the cap is pressed down to establish contact between the pin 38 and stud 18. circuit is now completed and the .motor is set in operation, the cap beine" rotated with the spindle.

ldlhen the reproducer needle l5 has tracked through the record grooves to an innermost position, it will lie in the circular path of the extension arm; at this point the needle engages the shoulder' 32 to arrest further rotation ot the cap. With continued movement of the spindle, however', the spring head 87 is tracked in the spindle threads 21, thus effecting a raise in the position of the cap until the pin 38 breaks contact with the stud 18. The electrical circuit is thereupon broken so as to stop the motor. It will be apparent, therefore, that this invention controls both the starting and stopping ot the motor, at any selected point in the playing ot the record.

It is clear that the present improvements may be embodied in a number of ditlerent terms only one of which has lherein been suggested. Except as the appended claims may contain express limitations, it is not to be interred that the principle of my invention is restricted in its application to the exemplitiedstructure shown, as inanitestly it is possible to use other forms, and in other adaptations, which would fall equally within the spirit and scope of my invention.

I claim:

1.. In a phonograph, the combination of a turntable, a rotatable spindle on which the turntable is mounted, an electric motor drivingly connected with the spindle, circuit connections leading from the motor to a point adjacent the upper end of the spindle, and i means providing a switch at the upper spindle end, substantially as described.

2. In a phonograph, the combination with an electric motor, a spindle adapted to be rotated thereby, a turntable associated with lili) Htl inf/0,303

the spindle adapted to receive thereon a groo'ved record, and a reproducer needle adapted to track in the record grooves and move toward the spindle, ot' circuit connections leading trom the motor to a point adjacent the upper end o't the spindle, and means arranged at the spindle upper end adapted to make or break said circuit whereby operation of the motor is controlled. said means being actuated to break the circuit by movement of the reproducer needle, substantially as described.

The combination with a phonograph having an electric motor, a spindle driving` y, connected therewith, and a tuii'ntable associated with the spindle, ot circuit connections leading troni the motor through the spindle to a point adjacent its upper end, said connections including a cap movably fitted to the spindle end, there being; a spring;` pressed. element mounted in the cap adapted when the latter is in one position to close the circuit and when in another position to break the circuit, substantially as described.

4. The combination with a phonograph having an electric motor, a spindle drivinplj.7 connected therewith, a turntable associated with the spindle and adapted to support a grooved record, and a reproducer equipped with a needle which tracks in the grooves et the record to move toward the center thereoiof circuit connections extendingtrom the motor through the spindle, said connections including a. cap movably `fitted to the spin-- dle and adapted when in one position to close the circuit and when in another position to open the circuit whereby the operation ot the motor is controlled, and means associated with the cap adapted 't'or engagement bv the reproducer needle to effect a change in the position ot the cap to thereby open the circuit, substantially as described.

5. In a phonograph, the combination with an electric motor, a turntable drivingly7 connected therewith adapted to receive thereon a groei/'cd record, and a reproducer having?1 a needle adapted to track in the record grooves and move toward the renter thereof, ot circuit connections extending` trom the motor through the turntable to a point above the record, said connections includinp; also a switch detacha bly arranged above the record whereby the circuit may be opened or closed to control the operation ot the motor, substantially as described.

6. in phonograph, the combination with an electric motor, a turntable drivingly connected therewith and adapted to receive thereon a grooved record, and a reproducer having a needle adapted to track in the record grooves and move toward the center thereof, of circuit connections extendingtrom the motor to a point above the turntable and including' a switch for opening' and closing the circuit, and means associated with the switch adapted tor engagement with the needlev when moved to a predetermined point to thereby open the switch, substantially as described.

7. ln a phonograph, the combination with an electric motor, a turntable, and a spindie drivingly connected therewith, ot circuit connections leading trom the motor through the spindle to a point adjacent its upper end, and a cap removably fitted to the spindle forming part ot said connections, the spindle being` tormed with threads and the cap havingI means yieldingly engaging therewith, whereby the cap may be screwed upon the threads or be moved thereacross, the capwhen in one position longitudinally of the spindle beingadapted to close the circuit, and when in another position to open the circuit, substantially as described.

8. ln a phonograph, the combination of a spindle having` a central aperture extendingto the upper end thereof and communicating' at its lower end with a lateral passage, a stud secured within an insulated mounting at the upper spindle end, a sleeve having; an insulated mounting at another place upon the spindle, an insulated wire connecting the stud and sleeve, means adapted to be `fitted onto the upper spindle and to establish :in electrical circuit between the stud and spindle body, the latter being grounded, means adapted i'or .rotation by the spindle to reproduce sound, an electric motor drivingly connected with the spindle, and connections trom a source of current to the motor, one pole ot which is grounded and the other connected to the insulated sleeve to establish a complete. circuit, substantially as described.

GEORGE C. TRUTTER. lWitnessr Erirnaiivt BANNING. 

